Affiliate marketing is in its simplest a marketing system where you get to earn commission for selling products of other companies and individuals. It has grown tremendously in the recent past with more and more people engaging in this marketing initiative with the sole reason of earning extra income. Affiliate marketing is broad and includes micro-campaigns that are slightly different from each other. Pay Per Click is one of its strategies where an advertiser pays the website owner a commission when a client clicks on his product. Similar to this is another affiliate marketing strategy called Pay Per Efficiency. In this marketing initiative the affiliate gets commission only when the referrals results into a buy decision. Affiliate marketing therefore lays a platform for many people to be involved in advertising efforts which enhance the chances of the products or services getting known and purchased.